[aprssig] Viscous digipeating (was: Airborne Digis)

[Curt, WE7U]

On Tue, 15 Sep 2009, Pentti Gronlund wrote:

> Make the fill-in digipeater listen to the frequency for a couple of
> seconds before digipeating. Then digipeat, if the packet hasn't been
> heard digipeated by another station.
>
> Simple, efficient, needs just some lines of code and some RAM space.
> You can get rid of the infamous WIDE1-1,WIDE2-1 hacks and survive even
> in Dayton.

If I recall correctly we've had this solution in the Xastir code for
some time but for igating to RF, not for fill-in digipeating.  It
seems to work well.

-- 
Curt, WE7U.                         <http://www.eskimo.com/~archer>
    APRS:  Where it's at!                    <http://www.xastir.org>
   Lotto:  A tax on people who are bad at math. - unknown
Windows:  Microsoft's tax on computer illiterates. - WE7U.
The world DOES revolve around me:  I picked the coordinate system!"